Thanks for DeeDarFan for the demonstration.

1. When you take the control of your units, send Sforza at the paladins (the nearest)

IMAGE 1 : https://prnt.sc/mjqigf

2. When you take the control of your new paladins, send one at the new checkpoint for collecting transports (IMAGE 2) and at the same time, send your condottiero and the other paladins here (IMAGE 3)

IMAGE 2 : https://prnt.sc/mjql2f (should be indicated on the map) IMAGE 3 : https://prnt.sc/mjqlzq (northwest of your current position)

3. When your paladin collects the transports, bring them near the closed door to carry your units on the other side of the river (you can go a little further to the right but beware there are troops hiding) and the time that the transports arrive, change the diplo of teal and yellow in enemy

4. Send your condottiero at the north of the camp and destroy the siege tower (IMAGE 4), and at the same time, send your paladins are northeast of the camp (IMAGE 5) but you must kill this paladin for win (IMAGE 6)

IMAGE 4 : https://prnt.sc/mjqr2t IMAGE 5 : https://prnt.sc/mjqpta IMAGE 6 : https://prnt.sc/mjqs09